— 1-4 —
B
B
3
3
t
t
y
y
p
p
e
e
B
B
5
5
t
t
y
y
p
p
e
e
1.1. Notes for Safety
1.1.2. Operational Remark
2
2
3
3
t
t
y
y
p
p
e
e
2
2
5
5
t
t
y
y
p
p
e
e
Figure 1-1
5 minutes or over
on
off
on
off
Control power
Main power
Remove cover.
！
Caution: Use of an optional regenerative dump resistor shall be considered for
heavy-duty operation.
à The Megatorque Motors regenerate when they decelerate carrying heavy load inertia.
à An internal dump resistor dissipates the regeneration. However, when high and
continuous regeneration is applied, it won’t dissipate excessive regeneration fully, and
it will overheat, and then the Motor will eventually stop under “Abnormal main power
voltage” alarm state.
à In such a case, you need to decrease velocity, deceleration rate, and operation duty
cycle, or, you require an external high capacity regenerative dump resistor.
Refer to “Appendix 5. Regeneration Dump Resistor.”
！
Danger: Never apply water or oil to the Driver Unit.
à Take appropriate measures to protect the Driver Unit from water, oil, slag, dust, and
corrosive gas.
Figure 1-2
！
Warning: Do not test the insulation of the Driver Unit. The high voltage used in the
test may destroy the Driver Unit circuit. Refer to “Appendix2. How to
Check Motor Condition” for checking insulation resistance of the Motor.
！
Caution: In most cases, the Direct Drive Motor System cannot exhibit its full
performance unless the shipping set of the parameters is altered. Refer
to “5. Tuning and Trial Running” for the detail of parameter setting and
be sure to tune the servo parameters to actual use conditions.
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